Electric lamp and discharge devices: systems – With radiant energy sensitive control means
Patent
1985-08-28
1987-10-27
Chatmon, Saxfield
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
315 3, 315 4, 315 541, 372 26, 372 74, H05B 3702, H05B 3904, H05B 4136
Patent
active
047032286
ABSTRACT:
An electron gun for emitting a modulated electron beam. The gun includes an evacuated envelope having an output end with a photocathode positioned in the envelope and responsive to light to emit electrons. An anode is positioned between the photocathode and the output end for accelerating the electrons emitted by the photocathode. The gun further includes a source of potential interconnecting the anode and the photocathode for maintaining the anode electrostatically positive relative to the photocathode. A first laser provides a first laser beam at a first frequency illuminating the photocathode, and a second laser provides a second laser beam at a second frequency illuminating the photocathode at the same time. The first frequency differs from the second frequency by a beat frequency, whereby the photocathode provides the electron beam with the electrons spacially bunched in accordance with the beat frequency. A method of providing a modulated electron beam is also disclosed.
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Chatmon Saxfield
GA Technologies Inc.
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